st/nine: Require gcc >= 4.6

Nine code uses some C11 features, and this
leads to compile error on gcc <= 4.5

Another way would have been to use the
-fms-extensions CFLAG

Signed-off-by: David Heidelberg <david@ixit.cz>
Cc: "10.4 10.5 10.6" <mesa-stable@lists.freedesktop.org>

diff --git a/configure.ac b/configure.ac
index 1c4e4c2448359fce48fc403539843af8d174ced6..e3b5f2e312447431f32decaaa2e36bd811469a73 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1633,6 +1633,10 @@ if test "x$enable_nine" = xyes; then
     if test "x$with_gallium_drivers" = xswrast; then
         AC_MSG_ERROR([nine requires at least one non-swrast gallium driver])
     fi
+    if test $GCC_VERSION_MAJOR -lt 4 -o $GCC_VERSION_MAJOR -eq 4 -a $GCC_VERSION_MINOR -lt 6; then
+        AC_MSG_ERROR([gcc >= 4.6 is required to build nine])
+    fi
+
     if test "x$enable_dri3" = xno; then
         AC_MSG_WARN([using nine together with wine requires DRI3 enabled system])
     fi